Thermospectroscopic study of the adsorption mechanism of the hydroxamic siderophore ferrioxamine B by calcium montmorillonite.

摘要: The behavior of iron-chelating agents in soils is highly affected by interactions with the solid phase. Still this aspect frequently ignored. In research adsorption siderophore ferrioxamine B Ca-montmorillonite, as a free ligand (desferrioxamine B, DFOB) and complex Fe3+ (ferrioxamine FOB), was studied, using thermo X-ray diffraction (thermo-XRD) temperature range 25−360 °C thermo-FTIR spectroscopy 25−170 °C. effect pH (4−7.5) on examined. Extensive use curve-fitting analysis required due to significant overlapping characteristic absorption bands various functional groups. Thermo-XRD showed that both DFOB FOB penetrated into interlayer space Ca-montmorillonite. FTIR results indicated strong within interlayer, which involved all groups (NH3+, secondary amide groups, hydroxamate groups). contrast, folded Fe ret...